What kind of harm will the typhoon cause?
What kind of harm will the typhoon cause? People in the southeast coastal areas of China probably know the severity of typhoons. Typhoons often bring strong winds and heavy rains at the landing site and its vicinity, and natural disasters can easily affect us. Let's share what kind of harm the typhoon will cause.
What kind of harm will the typhoon cause? 1 1. gale: the maximum wind force near the center of tropical cyclone reaches typhoon level 12 or above, causing damage to trees and buildings.
2. Heavy rain: Typhoon is one of the weather systems that bring heavy rain. In the area it passes through, it may produce rainfall of 150 ~ 300mm, and a few typhoons can directly or indirectly produce torrential rain above 1000mm, such as the torrential rain in southern Henan after tropical cyclone (indirect) 1975 landed.
3. Storm surge: Typhoon can increase water in coastal waters, and the maximum water increase in Jiangsu coastal areas can reach 3 meters. Typhoon "9608" and "97 1 1" increased water, which made Jiangsu's coastal areas along the Yangtze River have a super-historical climax.
4. Typhoon often brings stormy weather when crossing the border, causing huge waves on the sea surface, which seriously threatens navigation safety. After the typhoon landed, the storm surge may destroy crops and various building facilities, causing great losses to people's lives and property.
5. Typhoon is a potential risk factor for diseases such as hypertension, cardiovascular diseases, respiratory diseases and infectious diseases. The collapse of houses, glass fragments, collision of floating objects and falling from high altitude caused by typhoon will all lead to various injuries, which has the characteristics of high disability rate and high mortality rate.
What kind of harm will the typhoon cause? The harm brought by typhoon and its impact on the environment.
Typhoon disasters mainly occurred before and after the typhoon landed. Direct disasters caused by typhoons are usually caused by three aspects:
One is strong wind. The wind speed of typhoons is mostly above 17m/s, even above 60m/s ... According to the measurement, when the wind reaches 12, the wind pressure per square meter on the plane perpendicular to the wind direction can reach 230kg.
Therefore, typhoons and strong winds and the waves caused by them can throw the 10,000-ton ship into the air and break it, or push it inland. Hurricane winds are enough to damage or even destroy buildings, bridges and vehicles on land. Especially in areas where buildings are not reinforced, the damage is even greater. Strong winds also blow debris into the air, making the outdoor environment very dangerous.
The second is heavy rain. When the typhoon lands, the rainfall center can drop 100 mm -300 mm, or even 500 mm -800 mm of heavy rain a day. The flood disaster caused by typhoon and rainstorm is fierce and destructive, and it is the most dangerous disaster.
The third is storm surge. When the typhoon moves to land, due to the typhoon's strong wind force and low air pressure, the sea water accumulates strongly in the direction of the coast, the tide level rises sharply, and water waves flood the coast. The storm surge of a strong typhoon can raise the coastal water level by 5 -6 meters. If storm surge meets astronomical high tide level, it can produce high-frequency tide level, which will lead to flood, seawall burst, destroy houses and various building facilities, flood towns and farmland, and cause a large number of casualties and property losses.
Disaster caused by typhoon
Many natural disasters, especially high-level and strong natural disasters such as typhoons, destroy the harmonious conditions for human survival and often induce a series of other disasters. These secondary disasters and derivative disasters are often easily overlooked, causing heavy casualties and property losses.
The secondary disasters of typhoon include landslides and mudslides caused by heavy rain. In addition, houses, bridges, mountains and so on. Being washed and soaked by the flood for a long time in a typhoon, even if it didn't collapse at that time, it is easy to collapse after the typhoon flood recedes, so be highly vigilant.
China is a country with serious geological disasters caused by typhoons. Geological disasters such as landslides and mudslides caused by typhoons and rainstorms are very frequent, which are most likely to cause casualties. For example, when typhoon "Yunna" hit Zhejiang hard a few years ago, it caused a major mudslide geological disaster in Yueqing City, and typhoon "Wang Long" caused a flash flood disaster.
When Typhoon Morakot affected Taiwan Province Island, the whole village was flooded by mudslides. In some large and medium-sized cities, the rainstorm and seawater intrusion caused by typhoon are easy to cause secondary disasters such as urban waterlogging, resulting in traffic paralysis and subway outage, affecting the normal operation of cities and even causing casualties.
Typhoon may also cause ecological damage and epidemic diseases, such as storm surge caused by typhoon, coastal erosion caused by seawater intrusion and land salinization. Debris flow caused by typhoon will destroy forest vegetation; After a typhoon causes a flood, it is often prone to an epidemic. Sometimes typhoons even cause crop diseases and insect pests. In 2005, under the influence of typhoons "Mai Sha" and "Kanu", the northwest airflow and precipitation around the typhoons were beneficial to the large number of rice brown planthoppers, which once caused a sharp increase in the number of rice brown planthoppers in Shenchengtian.
What kind of harm will the typhoon cause? 3. The disaster caused by typhoon.
The disasters caused by typhoons are usually caused by three aspects:
One is the wind disaster. Typhoon gale and the waves caused by it can throw a 10,000-ton ship into the air, break its waist, or push it inland; On land, typhoons can uproot trees and overturn houses, causing great disasters.
Second, the typhoon rainstorm is more serious than the wind disaster. Short-term high-intensity precipitation can cause serious geological disasters such as landslides and mudslides, flooding of rivers and lakes, reservoir burst, road buildings washed away, traffic interruption, interruption of water and electricity supply, damage to factories and houses, casualties and so on. Typhoon rainstorm and its triggered landslides and mudslides are the main causes of many deaths caused by typhoons.
Third, the storm surge disaster is more serious than the rain disaster. It can flood islands, destroy dams, and flood inland, which can cause hundreds of thousands of people to be devastated in an instant.
Typhoon prevention measures
1. After the typhoon warning is issued by the Meteorological Observatory, don't go to the area where the typhoon passes or swim on the beach, let alone go sailing; People who go out should go home as soon as possible.
2. The residents living in the building should close the windows and take away the things on the balcony (flowerpots, clothes hangers, etc.). ); Reinforce outdoor objects that are easy to blow.
The public should pay attention to the typhoon news broadcast and published by the media and take preventive measures.
4. Clean the drainage pipes to keep the drainage unblocked.
5. Ships should sail into the safe harbor in time.
6. When the typhoon strikes, don't go near the window to avoid being hurt by the broken window glass.
Typhoon response measures
1, to avoid strong winds, you should choose places such as basements, air-raid shelters and culverts.
2. In the crowded and chaotic crowd in the typhoon, take a deep breath, put your arms on your chest, and use your arms, shoulders and back to resist external pressure.
3. Learn to avoid the strong wind at home.
A, quickly retreat to the basement or cellar, or the room closest to the ground, and squat down facing the wall.
B stay away from objects that may collapse, such as doors and windows, external walls of houses, etc.
C. Wrap yourself in a thick coat or blanket as much as possible. , to defend against possible scattered debris.
D, valuables should be transferred to the downstairs, can also be placed in washing machines, dishwashers and other electrical appliances.
E. After receiving the typhoon warning information, try not to go out and stay in a safe place at home.
F, take good care of your belongings when transferring.